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Earnings/(loss) per share (Tables)
12 Months Ended
Dec. 31, 2019
Earnings Per Share [Abstract]  
Basic and Diluted Earnings Per Share Calculation
The Company calculates basic and diluted earnings per share as follows:
 
   
Year Ended December 31,
 
   
2017
   
2018
   
2019
 
Numerator
      
Net (loss)/income
   (1,218,237   (12,276,520   2,093,124 
Less: Undistributed earnings allocated to non-vested shares
           (8,922
  
 
 
   
 
 
   
 
 
 
Net (loss)/income attributable to common shareholders, basic
   (1,218,237   (12,276,520   2,084,202 
  
 
 
   
 
 
   
 
 
 
Denominator
      
Weighted average number of shares outstanding, basic and diluted
   39,809,364    39,860,563    39,800,434 
  
 
 
   
 
 
   
 
 
 
(Loss)/earnings per share, basic and diluted
   (0.03   (0.31   0.05